RBC-3100 is an unmodified, medium-viscosity epoxy resin used as an epoxy potting compound and in epoxy casting applications where a clear epoxy resin system is desirable. Depending on the epoxy hardener selected, RBC-3100 epoxy resin can be cured at room temperature or at elevated temperatures to obtain the specific desired properties.
Mixed Viscosity @ 25oC, cps: 1,500
Shelf Life, (closed Container @ 25oC): 12 months
Color: Clear
Specific Gravity @ 25oC: 1.15
Hardness, Shore D: 92
Linear Shrinkage, in./in.: 0.008
Moisture Absorption 10 Days @ 25oC, %: 0.19
Izod Impact Strength, ft. lbs./in. of notch: 0.55
Tensile Strength @ 25oC, psi: 10,100
Compressive Strength @ 25oC, psi Clear: 21,000
Thermal Conductivity, cal/sec/cm2/oC/cm X 10-4: 5.2
Thermal Stability, 1000 Hrs. @ 175oC, % Wt. Loss: 0.45
Coefficient of Thermal Expansion, in./in./oC X 10-6: 50
Heat Distortion Temperature, oC: 140
Operating Temperature Range, oC: -55 to 140
Volume Resistivity @ 25oC, ohm-cm: 6×1015
Dielectric Strength, volts/mil: 475
Dielectric Constant @ 25oC, 100 KC: 4.3
Dissipation Factor @ 25oC, 100 KC: 0.030
(Note: The above properties are typical of a system cured with hardener #AB-312.)
A-110: A rigid, room temperature curing system with limited pot life and fast cure.
A-120, A-121: A resilient, low viscosity system with slightly longer pot life, that exhibits excellent resistance to thermal shock.
AB-312: Good resistance to heat, chemicals, thermal and mechanical shock, and good electrical properties at high humidity.
Weigh the desired amount of #3100 Resin into a clean container and combine with recommended hardener in one of the ratios shown below
| Hardener | Parts by Weight per 100 pts. Resin |
Pot Life 100 grams @ 25oC |
| A-110 | 14 | 35-40 minutes |
| A-120,A-121 | 30 | 40-50 minutes |
| AB-312 | 32 | 3 hours |
| Hardener | Cure @ 25oC | Cure @ 65oC | Cure @ 100oC | Cure @ 130oC |
| A-110 | 24 hours | 2 hours | — | — |
| A-120,A-121 | 24 hours | 2 hours | — | — |
| AB-312 | — | 6 hours | 3 hours | 2 hours |
